O-LevelBiologyTransport in Humans5090/11 · May/June 2019 · Q181 Mark

The graph shows how the pressure and volume inside the lungs change during one complete breath. [Figure 18.1] At which point are the muscles of the diaphragm starting to contract?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Apoint A in [Figure 18.1]

Bpoint B in [Figure 18.1]

Cpoint C in [Figure 18.1]

Dpoint D in [Figure 18.1]

✓ Correct answer

A: point A in [Figure 18.1]

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2019 Paper 1 Variant 1, question 18.

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